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(No Model.) 2 Sheets-Sheet 1 J. B. WARING.

PULVERIZING MAGHINE.

Nb. 328.625. Patented Oct. '20, 1885.

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(No Model.) 2 Sheets-Sheet 2 J. B. WARING.

PULVERIZING MACHINE.

Patented Oct. 20, 1885.

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N. PUEHS, Photo-Umqnpher, Wuhingim [LG JOHN B. WARING, OF NEW YORK, N. Y.

PULVERlZlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 328,625, dated October 20,1885.

Application filed July 24, 1884. Renewed June 15, 1885. Serial No. 168,799. (No model.)

To all whom, it may concern:

Be it known that I, JOHN B. WARING, of New York, in the county and State of New York, have invented a certain new and useful Improvement in Pulverizing Machines, of which the following is a specification.

I will describe a pulverizing-machine embodying my improvement, and then point out the various novel features in the claims.

In the accompanying drawings, Figure 1 is a central Vertical section of a machine embodying my improvement, the section being taken transversely to the shaft; and Fig. 2 is a central vertical section of the machine taken in the direction of the shaft.

Similar letters of reference designate corresponding parts in both figures.

A designates a chamber,consisting,as here shown, of two rings, a a, intermatched so as to form a tight joint, and two heads, a a, fitted to the outer edges of the rings. Bolts a, passing through the rings a a and through the edge portions of the heads a a, secure the several parts together. At the center of the interior surface of the rings a a is a circumferential recess, a into which is fitted a ring of steel, a. The interior of this ring of steel is transversely concavedor, in other words, is diametrically smaller at the side edges than at the center. Externally it tapers transversely from the center to the edges. The bottom of the recess a is tapered from the center to the edges to correspond with the exterior of the ring a. Between the bottom of the recess a and the ring a is preferably interposed a packing of indiarubber or analogous material, a The ring a is clamped tightly between the rings a a. It can be re moved and a new one substituted for it at pleasure. The packing a enables the ring a to be clamped tightly, and yet allows for differential expansion and contraction between the parts.

The head a is shown as quite flat,except at the outer edge, where it is rounded inward, so that its interior surface is approximately coincident with the interior of the ring a. At the center ofthis head is an outwardly-tapering tubular portion, a through which the material to be pulverized enters the chamber. From the tapering portion a a tube, a", ex-

tends upward to a hopper, whence the material to be pulverized is fed to the chamber.

The head a is of cone shape or tapering form from the ring a to a central tubular portion, a, which extends outward and communicates with a tube, a. This tube a is shown as extending upwardly, and it is to be connected to a suction-blower, whereby a current of air is caused to flow through the machine.

The chamber A inay be stationary, but preferably it will be capable of rotating. In the present example of my improvement the chamber is adapted to rotate; hence the tubular portions a a o ith'e heads a a are made externally cylindrical to serve as trunnions, and are supported in bearings a, comprised in standards a. The standards a are erected on base-pieces a, and secured thereto by bolts.

The tubes a and a do not rotate with the chamber. Around the tubes a and a, at their junction with the tubular portions a and a of the heads a a packings b are applied. They may consist of rope saturated with tallow or analogous material.

All the parts of the chamber A and the ap purtenances thereof which I have described, excepting only the ring a and the bolts, may be made of cast-iron.

In the chamber A are pulverizing-rollers B, which travel in close proximity to the interior surface of the ring a. These rollers 13 are propelled by rollers O. The rollers B and O are combined with a carrier, D, whereby they are revolved. As they revolve within the chamber A they rotate on their axes. The carrier D is affixed to a shaft, E. The shaft E extends through the chamber A and tubes a a. Where it passes through the tubes a a, sleeves a extend inwardly from the tubes around it, and disks to surround it closely outside the tubes to prevent leakage. The shaft is supported in bearings e, comprised in standards 6' erected on the base-pieces a.

The carrier D consists, essentially, of two plate-like portions, (1, an intermediate hublike portion, (1, and connecting portions d It may be made in one piece and of castiron.

The propelling-rollers O are arranged upon shafts 0, supported on the carrier; but the pulverizing-rollers B have no shafts.

. may contain.

The portions d of the carrier are arc'shaped, and they form guards, preventing the rollers B from dropping down when the motion of the carrier stops.

When the machine is in operation, the propelling-rollers 0 force the pulverizing-rollers B around the chamber A. As soon as the pulverizing-rollers B acquire sufficient centrifugal force,they fly out close to the interior surface of the ring a, and thereafter they travel around such ring.

The rollers B C may advantageously be made of steel.

The material to be disintegrated is reduced mainly between the ring a and the pulverizing-rollers B.

The pulverizing-rollers B are made convex across the periphery, so as to correspond with the interior surface of the ring a- The pro-' pelling-rollers 0 have their peripheries concaved. By making the rollers B O, respectively, convex and concave, and by making the ring a of the chamber A concave,the rollers B are guided, and all the rollers are centered relatively to each other and prevented from moving laterally.

The rotary motion which the rollers B impart to the rollers 0 tends to neutralize the centrifugal force generated in the rollers C,for the force with which the rollers B act upon the rollers G is exerted at such point as to tend to force the rollers O inward, or, in other words, toward the center of the chamber A.

Any material which may, by adherence to the pulverizing-rollers B, be carried around with the said pulverizing-rollers, will be fur- 'ther pulverized between these rollers and the propelling-rollers C.

To the carrier D is secured, by means of screws or otherwise, a plate or disk, F, which may be made of steel or iron. This plate or disk is considerably smaller diametrically than the interior surface of the ring a. The suction-blower that is connected with the tubea induces a current of air through the machine. This current of air enters the tube a", passes thence into the chamber A, passes around the edges of the plate or disk F, and out of the tub The disk F serves to direct the air downwardly toward the lower portion of the chamber A. Were it not for said disk the air would be apt to pass directly through the chamber in an axial line.

If desirable, the current of air issuing from the chamber A, after passing to an apparatus wherein the great bulk of pulverized material i separated from it, may be returned by the blower to the chamber A, in order to be used over and over again, for the purpose of avoiding the waste of pulverized material which it When the current of air is thus returned, it will preferably reenter through a branch, a", of the tube a".

Ifdesirable, the head a may have a head like the head a substituted for it, and then the material to be pulverized may be fed into each head through a tube, a. outline in Fig. 1.) In such case the material to be pulverized may not only be fed into each head of the chamber, but the pulverized material may be removed from each head.

The exterior of the rings a a of the cham- (Shown in dotted ber A is adapted to receive a belt, G, which I also passes around a pulley, H, on a rotary shaft, H. On the shaft H is also affixed a pulley, H A belt, I, passes around the pulley H and also around a pulley, I, upon the shaft E. The shaft H may be mounted in any suitable bearings and rotated by any desirable motor. The belt I'transmits motion from the shaft H to the shaft F1. quires a tendency to rotate in the directionin which the rollers B O revolve. The belt G, running on the pulley H,enables the drivingshaft H to resist this motion. To the extent to which the-shaft H resists the motion of the the shaft H.

The chamber A ac- By substituting for the pulley H pulleys of 0 different sizes the rate of speed at which the chamber will rotate will be varied.

The centrifugal force generated by the rotation of the chamber may of course be changed by varying the speed of the rotation of the chamber. This can be done without altering the speed of the revolution of the rollers B 0.

During the operation of the machine the material to be pulverized acquires a centrifugal force and flies out against the ring a". The pulverizing-rollers act on the material to be pulverized throughout the entire inner surface of the ring a when the said material is distributed all around the ring a; hence the wear of this ring is much more uniform than it otherwise would be. This also results in obviating the shocks which occur when pulverizing is done only at one part of the chamber of a pulverizer.

The force of the current of air which passes through the chamber A may be varied by using a larger or smaller plate or disk, F, so as to contractor enlarge the space between-the edge of the disk and the adjacent part of the chamber A.

By changing the speedof the rotation of the rollers, a carrier, and rollers journaled in the carrier and serving to propel the pulverizingrollers, substantially as specified.

2. In a pulverizing-machine, the combina tion of a chamber into which the material to be pulverized is introduced,loose pulverizingrollers, a carrier, rollers journaled in the carrier, and guards comprised in the carrier for preventing the loose rollers from dropping from the top to the bottom, substantially as specified.

3. In a pulverizing-machine, the combination of a chamber having a concave interior surface for receiving the material to be pulverized, loose pulverizing-rollers having conveX peripheries corresponding to the concave interior surface of the chamber, a carrier, and rollers having a concave periphery corresponding to the convex surface of the pulverizing-rollers, substantially as specified.

4. In a pulverizing-machine, the combination of a chamber, into which the material to be pulverized is introduced, loose pulverizingrollers, a carrier, rollers journaled in the carrier and guards, and a disk attached to the carrier, substantially as specified.

5. In a pulverizing-niachine, the combination of a rotary chamber, into which the material to be pulverized is to be introduced, pulverizing-rollers arranged within the chamber, and a carrier for revolving the pulverizingrollers in the same direction as that in which the chamber rotates.

6. In a pulverizing-machine, the combination of a rotary chamber, into which the material to be pulverized is introduced, pulverizing rollers arranged within the chamber, a

carrier, and rollers journaled to the carrier and serving to propel the loose rollers, all the said rollers being adapted to revolve in the same direction in which the chamber rotates, substantially'as specified.

7. In a pulverizing-machine, the combination of a rotary chamber, into which the ma terial to be pulverized is introduced, pulverizing-rollers arranged within the chamber, a carrier for the pulverizingrollers, a belt from the chamber to a pulley on a shaft, and a belt from another pulley on the said shaft to a shaft on which the said carrier is mounted, substantially as specified.

8. In a pulverizing-machine, the combination, with a horizontally-rotating chamber having hollow trunnions upon which said chamber rotates, and through which material to be pulverized may be received and discharged, of pulverizingrollers arranged Within the chamber and a carrier for revolving the pulverizing-rollers in the same direction as that in which the chamber rotates.

JOHN B. WARING.

Witnesses:

T. J. KEANE, J AMES R. BOWEN. 

